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onsemi TIP49TU
- Part No.:
- TIP49TU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
TIP49TU.pdf
- Description:
- TRANS NPN 350V 1A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,895
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Product details
Overview
TIP49TU from ON Semiconductor is a high-voltage NPN silicon power transistor in TO-220 package, rated for 350 V collector-emitter sustaining voltage (VCEO(sus)), 1 A DC collector current, and 40 W case power dissipation at 25°C - used in line-powered switch-mode power supplies, relay drivers, and industrial motor control stages.
For engineers reviewing the TIP49TU datasheet, pinout, applications, or equivalent options, key selection criteria include VCEO(sus) = 350 V, hFE = 30–150 at IC = 0.3 A, VCE(sat) ≤ 1 V at IC = 1 A / IB = 0.2 A, thermal derating above 25°C, and TO-220 mechanical compatibility with heatsink mounting.
Technical Context
The TIP49TU operates as a general-purpose switching transistor with fixed NPN polarity, requiring external base drive to saturate or cut off. Its 350 V VCEO(sus) rating enables use in 230 VAC line-referenced circuits without snubbers under controlled switching conditions.
Thermal performance is defined by RθJC = 0.625°C/W (calculated from PC = 40 W at TC = 25°C), and safe operating area (SOA) is limited by second breakdown at high VCE/IC combinations - pulse operation must comply with tw ≤ 300 μs and duty cycle ≤ 2%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(sus) | 350 V - supports switching in 230 VAC-derived rails with margin before avalanche onset |
| IC (DC) | 1 A - continuous load current capability with adequate heatsinking at TC ≤ 25°C |
| PC | 40 W - maximum power dissipation at case temperature of 25°C; derates linearly above |
| hFE | 30–150 - usable DC gain range at VCE = 10 V, enabling reliable base drive design for 0.3–1 A loads |
| VCE(sat) | ≤ 1 V at IC = 1 A, IB = 0.2 A - low saturation loss critical for efficiency in hard-switched applications |
| fT | 10 MHz - sufficient for audio-frequency and SMPS switching up to ~100 kHz with gain margin |
Pinout & Package
Package: TO-220 3L (Single Gauge), through-hole, vertical mounting with metal tab electrically connected to collector. Requires insulated mounting hardware when collector is not at chassis ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input | Receives forward-biased current to turn on transistor; requires ≥0.2 A for full saturation at IC = 1 A |
| 2 (Collector) | High-side current path | Connected to load supply rail; tab is electrically tied to this terminal - isolation required if mounted to heatsink |
| 3 (Emitter) | Current return path | Typically grounded or connected to low-side switch node; establishes reference for base drive and load current sensing |
Key Features
| Feature | Design Value |
|---|---|
| High VCEO(sus) | 350 V enables direct use in 230 VAC rectified bus applications without voltage clamping |
| Robust SOA | Rated for pulsed operation up to 2 A with defined time/duty limits - supports inductive load switching |
| TO-220 mechanical standard | Industry-standard footprint and mounting hole pattern ensures compatibility with existing PCB layouts and heatsinks |
| DC current gain range | hFE = 30–150 at IC = 0.3 A allows predictable base resistor selection across manufacturing lot variance |
Applications
| AC/DC Power Supply Switching | Industrial Relay Driver |
|---|---|
Use Scenario: High-voltage switching stage in offline flyback or forward converters operating from 230 VAC mains. IC Role / Device Role / Timing Role: Main power switch controlling energy transfer to transformer primary. Use Value: 350 V VCEO(sus) provides 25% margin over 275 V peak rectified voltage, reducing need for snubber networks. |
Use Scenario: Driving 24–120 VAC/DC electromagnetic relays in PLC output modules. IC Role / Device Role / Timing Role: High-current interface between microcontroller GPIO and relay coil. Use Value: 1 A IC rating accommodates typical relay coil currents (20–500 mA) with thermal headroom for repeated actuation. |
| Motor Control Interface | Linear Regulator Pass Element |
Use Scenario: Low-frequency PWM driver for small universal motors or solenoid valves in HVAC actuators. IC Role / Device Role / Timing Role: Series pass element switching motor power on/off at <1 kHz. Use Value: 40 W PC supports short-duration stall currents up to 1 A without thermal shutdown when heatsinked. |
Use Scenario: Pass transistor in high-input-voltage linear regulators for instrumentation front-ends. IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output against varying load. Use Value: VBE(on) = 1.5 V at IC = 1 A enables stable biasing with minimal base drive overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-voltage switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD44H11T4G | TO-252 (DPAK), 300 V VCEO, 8 A IC, lower hFE (15–80), surface-mount | Not drop-in compatible - requires PCB redesign; better suited for high-current SMT designs | Select when space-constrained PCB layout favors SMT and higher peak current is needed |
| BU508AF | TO-3P, 1500 V VCEO, 8 A IC, slower fT (1 MHz), higher VCE(sat) (1.5 V) | Over-specified voltage rating increases cost and switching loss; requires larger heatsink | Choose only when >600 V transient immunity is mandatory, e.g., in surge-prone industrial mains interfaces |
Compared with MJD44H11T4G and BU508AF, the TIP49TU offers optimal balance of voltage rating, thermal capability, and through-hole manufacturability for mid-power 230 VAC-derived systems - neither over-engineered nor thermally marginal.
Availability
TIP49TU is available at Aetrix Electronics and suitable for AC/DC power supplies, industrial relay drivers, motor control interfaces, and linear regulator pass elements requiring stable component supply and long-term industrial availability.
Supply support for TIP49TU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensor, and logic solutions for automotive, industrial, cloud, and consumer markets.
The TIP49TU belongs to ON Semiconductor's legacy high-voltage bipolar transistor product line, originally developed by Fairchild for robust, cost-effective switching in mains-connected equipment where reliability and thermal stability are critical.
FAQ
What is the maximum collector-emitter voltage rating for TIP49TU?
The TIP49TU has a collector-emitter sustaining voltage (VCEO(sus)) of 350 V, measured at IC = 30 mA with base open. This rating defines its safe blocking capability in switching applications - exceeding this voltage risks avalanche breakdown. The TIP49TU must be operated within this limit under all conditions, including transients, to ensure long-term reliability.
Does TIP49TU have a built-in base-emitter resistor?
No, the TIP49TU is a discrete NPN bipolar junction transistor with no integrated base-emitter resistor. It requires an external base resistor to limit drive current - typically sized to deliver ≥0.2 A base current for full saturation at IC = 1 A. This gives designers full control over switching speed and power loss trade-offs.
Can TIP49TU be used in place of TIP47TU or TIP48TU?
The TIP49TU is not a direct replacement for TIP47TU (250 V VCEO(sus)) or TIP48TU (300 V VCEO(sus)) without circuit review. While pin-compatible and same-package, its higher 350 V rating may mask design weaknesses in voltage margin - verify SOA, snubber requirements, and base drive under worst-case line conditions before substitution.
What is the thermal resistance from junction to case for TIP49TU?
The TIP49TU has a calculated junction-to-case thermal resistance (RθJC) of 0.625°C/W, derived from its 40 W power dissipation rating at TC = 25°C. This value assumes proper mounting to a heatsink with thermal interface material - actual system RθJA depends on heatsink size, airflow, and PCB copper area.
Is TIP49TU suitable for linear regulator applications?
Yes, the TIP49TU can serve as a pass transistor in high-input-voltage linear regulators due to its 350 V VCEO(sus), 1 A IC, and 40 W PC. However, linear operation demands careful thermal design - continuous dissipation must stay within derated limits, and VCE(sat) ≤ 1 V helps minimize dropout-related losses at full load.
TIP49TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 350 V
- Vce Saturation (Max) @ Ib, Ic:
- 1V @ 200mA, 1A
- Current - Collector Cutoff (Max):
- 1mA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 30 @ 300mA, 10V
- Power - Max:
- 2 W
- Frequency - Transition:
- 10MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
TIP49TU FAQ
1.How can I place an order for TIP49TU through Aetrix?
Please submit a Request for Quotation (RFQ) for TIP49TU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TIP49TU reliable?
The price and inventory of TIP49TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIP49TU is usually 5 days.
3.What payment methods are accepted for TIP49TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIP49TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TIP49TU?
TIP49TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TIP49TU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TIP49TU?
For technical support, including TIP49TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIP49TU requirements.
6.How does Aetrix verify that TIP49TU is sourced from the original manufacturer or authorized distributors?
All TIP49TU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TIP49TU meets industry standards.
7.What is the process for return or replacement of TIP49TU?
All TIP49TU units undergo pre-shipment inspection (PSI). If there is an issue with TIP49TU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TIP49TU part is unused and in its original packaging.
Return procedure for TIP49TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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